Combined ore grinder and amalgamator



w. DE COURSEY. COMBINED ORE GRINDER AND AMALGAMATOR.

- APPLICATION FILED FEB. 9, I918.

Patented June'S, 1928.

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TOMBINEDORE GRTNDERANDWWIAEGAMATOR. APPLICATION FILED FEB. 9. 1918.

1,343,0 1 1 Patented June 8, 1920.

W. DE COURSEY. COMBINED ORE GRINDER AND AMALGAMATOR.

APPLICATION FILED FEB. 9, 1918- i 1,343,041 Patented June 8, 1920..

3 SHEETS-SHEET 3.

WILLIAM DE CDURSEY, OF SAN FRANCISCO, CALIFORNIA.

COMBINED ORE GRINDER AND AMALGAIVIATOR.

Application filed February 9, 1918.

To all whom it may concern:

Be it known that I, lVILLIAM DE Connsnr, a citizen of the United States, residing at San Francisco, in the county of San Francisco, State of California, have invented cer tain new and useful Improvements in Combined Ore Grinders and Amalgamators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to ore reducing machinery and more particularly to ore pulverizing machines and has for its object to provide a machine of this kind which will be operable to thoroughly pulverize ore or other material placed therein.

Another object is to provide a structure.

i-inother object is to provide a commercially practicable structure.

Another object is to provide a structure including a pan and including operating mechanism so mounted that lubricants used thereon will not have access to the pan.

Another object is to provide a pulverizer including a revoluble pan, a plurality of grinding elements co-acting with the pan and a single means for operating both the pan and the grinding elements.

Another object is to provide a pulverizer which may also be used as an amalgamator.

Another object is to provide a novel mounting for the shaftsof the grinding elements and to provide a novel arrangement of driving means for these elements.

In the drawings:

Figure 1 is a side elevation of the complete pulverizer;

Fig. 2 is a top plan;

Fig. 8 is a section taken on line 3-3 of Fig. 2 in the plane of the power shaft;

compact Fig. 4 is an enlarged detail of one of the grinding elements and its mounting showing the parts in section;

Fig. 5 is a top plan with .the casing removed;

Fig. 6 is an enlarged detail similar to Fig. 4 showing the parts in elevation;

Fig. 7 is a horizontal. section on line 77 of Fig. 1 looking downwardly;

Fig. 8 is a section line 0f t-i" 1 looking upwardly;

Specification of Letters Patent.

Patented June 2, 1929.

Serial No. 216,170.

Fig. 9 is a detail section taken at right angles to Fig. 3, illustrating the mounting of the sleeve, the drip pan and the discharge chute;

Fig. 10 is a view similar to Fig. 4 taken at right angles thereto;

Fig. 11 is a detail perspective.

Referring now to the drawings the present invention comprises a base plate 10, havprovided with a central conical recess 12 surrounded by an upstanding bearing sleeve 13. At opposite sides of this boss there are mounted a pair of uprights 1 1 which, at their upper ends, carry and sup port the top frame 16 of the machine, a third upright 15 is located at a point midway between the uprights 14, at one side of the boss.

The frame 16 includes two pairs of oppositely extending arms indicated at 17, 18, 17 and 18, the arms 17, 17 and 18 being somewhat longer than the arm. 18 and having the uprights l4 and 15 engaged therethrough and held therein by nuts 19 engaged with the upper ends of the uprights. Centrally of the frame 16 there is formed an opening 20 provided with a suitable hearing 21, and extended through this opening there is a central shaft 22 which has its lower end seated in the conical recess 12 of the boss 11.

Secured upon the shaft 22 just above the sleeve 13 by means of a key 23 or other suitable fastening device, there is a horizontally arranged sprocket wheel 24 which includes a hub 25 surrounding the shaft, and an outer toothed periphery 26.

Formed through the hub 25 there area plurality of vertical passages 28, and secured upon the sprocket wheel there is a circular pan 29, having its bottom 30 bolted to the sprocket wheel, this pan having a central opening 31 surrounding the series of openings 28 in the hub and at the edge of the opening 31 there is an upstanding sleeve 32 carried by the bottom of the pan, this sleeve surrounding the shaft 22 in spaced relation thereto and terminating short of the upper edge of the pan. the bottom of the pan there is disposed a surfacing of suitable grinding material 33.

The sleeve 32 serves to conduct the fine slimes to and through the openings 28 ing secured thereupon a bearing boss 11.

Upon

will be apparent from the later description,

and beneath the hub 25 there is arranged a discharge chute 34 which receives materials passing through the passages 28 and discharges them at the side of the machine.

For the purpose of revolving the shaft 22 and the pan 29, there is mounted upon the upright 15 ahorizontally arranged revoluble belt wheel 35 held in place by bearing collars 36, and this belt wheel carries a sprocket 37 lying in the plane of the sprocket 24 and which receives therewith a horizontal driving chain 38. Surrounding this driving chain there is a suitable drip and protecting pan 39 supported by the brackets indicated at 40. Y

Mounted at their upper ends in each of the arms of the frame there are two shafts 41 each of which forms a part of a grinding element to be described later in detail. These shafts are arranged vertically and project above the frame 16, also extending therebelow and depending into the pan 29. The shafts are arranged longitudinally of the arms so that in the embodiment of the invention shown in the drawings there are four shafts arranged in a circular series around the central shaft 22 and spaced ninety degrees from each other, and four additional shafts similarly spaced from each other are arranged in a circle surrounding the first four shafts, there being thus an inner and an outer series of shafts.

The mounting of these shafts 41 is shown clearly in Figs. 4 and 6; The mounting consists in each instance of a member which is engaged through the frame 16, openings 16 being provided in the frame for this purpose, and each member includes a central sleeve portion 42 having a circular flange 43 at its upper end and a laterally elongated head 44 atits lower end. The openings 16 are somewhat elongated, extending longitudinally of the arms 17, 18, 17 and 1S, and the heads 44 of the shaft mountings are of a size to pass through these openings 16 when disposed longitudinally thereof, after which the mountings may be turned to bring the heads transversely of the arms when they will extend beyond the sides of the openings, and be held against disengagement therefrom. Engaged through each of the.

flanges 43 there are a plurality of set screws 45 whlch bear at their lower ends against the frame 16 and thus hold'the mountings with their heads 44 against the under face of the frame. It will be understood that one of the shafts 41 lies with its upper portion within each of the sleeves 42. Suitable cover plates 46 are secured across the openings 16 at the sides of the sleeves 42 to prevent the passage of oil or other lubricant through the openings.

The head 44 in each instance is provided.

with a depending hub 47 surrounding the shaft 41 and engaged with this hub there is one member 48 of a thrust bearing having a recess 49 which receives the hub. The

other member 48- of the thrust bearing is secured to the shaft 41, and between the two members of the bearing there are anti-fr ction devices 50. This construction P61111158 of the use of cast iron in making the sleeves face of the head 52. Eccentric to the element 55 there is a circular recess 56 which receives the lower end of the shaft 41, there being also a socket 57 formed in thebottom of the recess 56 eccentrically thereto and receiving a depending finger 58 carried by the lower end of the shaft. This finger 58 en gaging in the socket 57 serves to rotate the head 52 with the shaft, and the location of the shaft eccentrically to the element 55 results in eccentric movement of this ele ment. As shown in the drawings, the grinders lie with the under surfaces of their elements 55 upon the surfacing 33 in the bottom of the pan 29 and they are held yieldably thereagainst by helical springs 59 surrounding the shafts 41 and engaged at their upper ends against the lower members 48 of the thrust bearings and at their lower ends against the heads 52. When engaged against the surfacing 33 the grinders lie with the bottoms of their recesses 56 spaced from the lower ends of the shafts 41 and with the bottoms of their sockets 57 spaced from the lower ends of the fingers 58 so that the grinders are free to rise against the action of the springs 59.

The central shaft 22 of the mechanism extends above the frame 16 and at its upper end it carries a pluralityof sprocket wheels 60. Each of the shafts 41 carries a sprocket wheel 61 at its upper extremity, these sprocket wheels being located each in the horizontal plane of one of the sprocket wheels 60, and engaged with each pair of sprocket wheels which occupy a common plane there is a chain 62 so that the several shafts 41 are revolved by the central shaft 22 in a common direction.

By reason of the arrangement of the shafts 41, the grinders are disposed in pairs, each pair being in alinement radially of thepan as clearly shown in Fig. 7, and formed in the upper face of the surfacing 33 to surround each of these pairs of grinders there is a groove 63, the several grooves intersecting as illustrated. These grooves are for the reception of mercury when the apparatus is used as an amalgamator.

A casing 641 surrounds the portions of the operating mechanism which lie above the frame 16.

Disposed interiorly of the circular pan 29 is a removable lining, preferably of cylindric shape and made in sections 64 to be disposed against the inner face of the side wall of said pan, the sections being made preferably from copper and this lining constitutes a scraping surface. The upper edges of the sections of the lining are formed with spaced outwardly and downwardly bent hooks 65 which serve as hangers for the sections of the lining and are adapted to engage over the upper free edge of the pan 29 when the lining is mounted interiorly thereof. These sections 6% of the lining may be readily removed for the easy scraping thereof with despatch and replated should the occasion require.

By removing the sections 6% of the lining and dispensing with the use of mercury in grinding ores of different kinds, oil instead of water may be used.

Formed on the frame 16 is a suitable bracket or support 67 carrying a scraper blade 68 which is adapted to engage either the side wall of the pan 29 or the lining when held therein and the purpose of this blade 68 is to keep ore from piling at the side of the pan or the lining as will be clearly apparent.

In use, ore to be pulverized is thrown into the pan 29 with a quantity of water which may be fed continuously thereto from a suitable hose. The mechanism being started, the pan will be revolved and each of the grinders will also be revolved. By reason of the eccentric rotation of the grinders the ore will be drawn therebeneath and pulverized, the springs 59 permitting the grinders to rise and accommodate themselves to the thickness of the ore particles. As the ore is ground, the fine slimes will rise with the water passing over the upper edge of the sleeve 32 and out of the machine as will be understood.

It will be seen that the mounting of the elements 55 is such that should they become worn or broken it is only necessary to raise the heads 52 for the removal of the elements and the substitution of new ones.

What is claimed is:

1. In a grinder of the class described, the combination with a pan rotating 011 an upright central shaft and having a grinding surface; of a series of shafts disposed around and in parallelism with said central shaft and operatively connected therewith for simultaneous rotation, each shaft of said series having a finger depending eccentrically from its lower end, a head whose lower face coacts with said grinding surface, the

and provided with elongated openings disposed in series around said bearings, a r0- tary shaft in the bearings, and a pan fixed to the shaft below the frame and having a grinding surface; of two series of grinder heads whose lower surfaces contact with that of the pan, shafts rising from the heads through said openings, means for rotating the shafts, and for each shaft a hub having a lateral head adapted to be passed down through one of said openings and turned and above the head a circular plate, set screws therein to bear on the top of said arm, and a thrust bearing whose members are carried respectively by the lower end of the hub and the shaft.

3. A mechanism of the class described including a vertically disposed rotatably mounted shaft, laterally extending supporting portions carried by the shaft, a pan disposed upon the supporting portions and having a central opening surrounding the shaft, an upstanding sleeve carried by the pan and surrounding the opening, said open ing and sleeve having their inner walls spaced from the shaft, a grinding surface within the pan, grinders within the pan and arranged to coact with said grinding surface, and a discharge chute located beneath the opening of the pan.

4:. A mechanism of the class described including a shaft mounted in upright bearings, a pan mounted on said shaft and having openings near it, a sleeve rising from the pan around the openings, a grinding surface within the pan around the sleeve, grinders resting on said surface, means for revolving them eccentrically on their own axes, and means for revolving said shaft and pan.

5. A mechanism of the class described including a central rotatable shaft, inner and outer series of shafts arranged concentrically with the central. shaft, driving connections between the central shaft and the shafts of the series, a pan carried by the central shaft and disposed to receive the shafts of the series therewithin, a grinding surface within the pan, grinding elements carried by the shafts of the series and contacting the grinding surface, said grinding elements being mounted upon the shafts for eccentric rotation and means for rotating the central shaft.

6. A mechanism of the class described including an upright central shaft, inner and outer series of shafts disposed around the same, driving means applied to the upper ends of all shafts, a pan fixedly carried by the lower portion of the central shaft and having a central outlet surrounded by an upstanding sleeve spaced from said central shaft, a grinding surface within the pan, grinding elements eccentrically carried by the shafts of the series, yielding means bearing them into contact withthe grinding surface, and means for rotating the pan and central shaft.

In testimony whereof, I aflix my signature in the presence of two witnesses.

WILLIAM DE GOURSEY. Witnesses:

' W. W. HEALEY,

M. E. EWING. 

